Wall box fan



G. H. KOCH WALL BOX FAN Jan. 1, 1952 Fild June 5, 1948 2 SHEETS-SHEET l INVENTOR 4 GUSTAV HKb 0H WITNESSES: ,9. a:

BY g

TTORNEY G. H. KOCH WALL BOX FAN Jan. 1, 1952 Filed June 5, 1948 2 SHEETS-SHEET 2 INVENTOR I GUsTfivH/(ocH W-(q A TORNEY llllllll lllllirl I.

wall 2 I.

at its ends has downwardly extending hinge legs Patented Jan. 1 1952 UNITED STATES PAT OFFICE Wi li-i1; Box Gustav H;;Koc'h, ,sp'ringfieldi Mass';, assignor' to Westinghouse Electric Corporation, East Pitts burgh, Pa., a corporation 01 Pennsylvania Application June 5'; 1948,-Serial Net-31,361

1E invention relates to" a: wall box fan; more particularly to the casingistructure' thereof.

It is an object of my invention to-provide an servestoconnectseveral:- flanges of the casing.

structure;

3 Claims (01. 98-116) These and other objects are efiected by my inventionaswill beapparent from the following description and claims taken in connection with the accompanyingdrawings, forming a part of this application, in which:

Fig. 1 is a perspective view of-a wall box fan:

in accordance with my invention;

Fig. 2 is a fragmentary front elevation, with the hood in section;

Fig. 3'isa' vertical section" taken on the line III--III"f.Fi"g. 1;

Fig. 4*is a'vI'ertical section taken along-the axis of V the fan;v r

Fig. 5 is'a-isimilar sectional view: of the doorin closed position; and

Fig. 6 is a vertical section taken in a plane perpendicular to the axis, and looking toward the outside.

Referring to the drawings in detail, the casing structure of the wall box fan comprises inner and outer tubular or sleeve sections I0 and II which extend through an opening in the wall l2. The fan motor unit, comprising a motor I3 and a fan I overhung on the shaft of the motor, is supported in the inner section I!) by means of arms l5 and brackets 5. A suitable grill I! may be attached to the section II], substantially flush with the inner surface of the wall l2.

The casing structure further comprises an outer wall 2|, which is of rectangular outline. The wall 2| is formed with a circular opening and an inwardly extending flange 23 which surrounds the opening and fits ithin the outer end of the sleeve section II. At its outer edges, the Wall 2| is formed with inwardly extending flanges, including a top flange 24, vertical flanges 25 and a" bottom flange 26. The lower ends of the flanges 25 are secured to the flange 26 by means fof angle pieces 21 attached to the inner surfaces of the flanges, as shown in Fig. 6.

A hood member 28 extends over the top of the It is spot welded to the top flange 24 and with outwardly extending flanges3|l lying against the-outer surfaceof: the-wall l2.

legs-29;. suitable means, such as cotter pins,.-being the drawings and-as will be further described;

A door 32 for closing the opening in the wall 2| comprises inner and outer sheetvmetar members 33' and 34- and a sh'eetrof insulating material 35' therebetween, the parts being secured inany suitable" manner,-as by rivets: The: inner sheet 33 of the door is preferably provided by'the material cutfrom the wall 2| in forming the opening therein. I

A- hook member 36 extends along theupper portionofthe door 32 and is secured to the outer sheet 34,.as by spot welding. The hook member 36; is formed so that, when the door is closed asrshownin Fig- 5-, it extends from the door upwardly, then outwardly over the hinge and then downwardly. It will also be noted from Fig. 5 that when the door is in closed position, the upper edge extendsbetween the wall 2| and the hinge pin-3|.

The outward use is limited by an arm 31 which is hinged on a bracket 38 disposed within the opening in the wall member 2| near the top thereof. The other end of the arm 31 extends through an opening in a bracket 39 attached to the inner sheet 32 and has a washer 40 and a cotter pin beyond such bracket. Thus, as the door moves outwardly, the arm 36 swings along with the door until the washer 40 strikes the bracket 39 to prevent further opening movement, as shown in Fig. 4. A compression spring 4| is also wound around the arm 3'! and acts on the bracket 39 to bias the door outwardly in opening direction. Any suitable means, such as a cord or chain 42, may be provided for actuating the door against the bias of the spring 31.

In normal use, the spring 3'! biases the door 32 away from the hinge pin 3|, thereby urging the hook member 36 into engagement with the hinge pin. Also, in normal use, the hook member cannot be disengaged from the hinge pin, even against the force of the spring 31, because of the close proximity of the hood member 28 and the wall 2|.

Referring to Fig. 5, it will be noted that the hood 28 isso close to the hinge pin 3| as to A hinge pin 3| extends through and is supported by the'hinge movementpfthe door in normal prevent the upward movement of the hook 9B which is necessary to disengage it from the pin. In the open positions, such as the one shown in Fig. 4, the pin 3| is sufliciently close to the wall 2| so that the upper edge of the outer sheet 34 would strike the wall member 2| before the book could disengage the pin.

In order toremove the door from the hinge, the cotter-pin and the washer on the arm 31 are removed and the door is raised to approximately horizontal position as shown in Fig; 3. In this position, the upper edge of the sheet 34 has been rotated a sufficient distance from the wall 2|, to permit the door to be moved towards the wall 2| sufiiciently to permit the outer edge of the hook to disengage the pin 3| and to be withdrawn downwardly between the pin 3| and the wall member 2|.

As will be noted from the drawing, the hood member 28 provides a shield or guard over the door hinge and over the top portion of the door and the wall 2|. The hood also serves to connect the top and side flanges of the wall 2|, thereby dispensing with angle pieces which would otherwise be necessary, such as those at the bottom corners.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the'spirit thereof.

What I claim is:

1. In a wall box fan, a casing structure comprising a sheet metal member including a vertical outer wall and top and side flanges extending inwardly from the top and the sides of said outer wall, a sheet metal hood member including a substantially flat and horizontal portion extending along the top of and secured to said top flange and further including flanges or hinge legs extending downwardly from the ends of said horizontal portion and secured to said side flanges, whereby said hood member serves to connect said top and side flanges, said hinge legs extending forwardly of said outer wall anda hinge pin attached to said hinge legs in outwardly spaced relation to said outer wall, said horizontal portion of said hood member extending outwardly beyond and over said hinge pin to provide a hood therefor.

2. In a wall box fan, the combination of a casing structure having an outside wall formed with an opening therein, a door for closing said opening, a hinge pin disposed horizontally above said opening in spaced relation to said outside wall, a hood member disposed above said hinge pin in spaced relation thereto, a door for closing said opening, said door being provided with a hook-shaped hinge member attached to the upper portion of said door and bent outwardly and downwardly therefrom so as to engage said hinge pin, means for limiting the extent of opening movement of said door, said limiting means being disengageable to permit greater opening movement when desired, the spacing between said hinge pin and said hood member and between said hinge pin and said outer wall being sufficiently small to limit the movement of said door toward the hinge pin to prevent disengagement of said hinge member from said hinge pin when the door is in closed position or in an open position permitted by said door opening limiting means, and the spacing between the hinge pin and the outer wall being suflicient to permit the hinge member to be disengaged from said hinge pin when the door is moved in opening direction substantially beyond the position permitted by said door opening limiting means.

3. A wall box fan as set forth in claim 2 and further including a spring biasing said door downwardly and outwardly, thereby biasing said hinge member into engagement with said hinge pin.

GUSTAV H. KOCH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,233,523 Symonds July 1'7, 1917 1,792,514 Spear Feb. 17, 1931 2,225,349 Morse Dec. 1'7, 1940 2,246,602 Schultz et al June 24, 1941 2,339,363 Sutcliffe et a1 Jan. 18, 1944 2,355,836 Willey Aug. 15, 1944 

